Gearing



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G. MURRAY, J1.

GEARING.

Patented Oct. 9, 1883.

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UNITED S'rAfrns GEORGE MURRAY, JR., OF OAYMBRIDGEPORT, ASSIGNOR OF ONEHALF TO CHARLOTTE MORGAN, OF MELROSE, MASSACHUSETTS.

GEAR

SPECIFICATION forming part of Letters Patent No. 286,550, dated October 9, 1883.

' Appication tiled March 17, ISES. (No model.)

To all whom it may con/cern,.-

Be it known that I, GEORG-E MURRAY, Jr.,

Ta citizen of the United States, residing at Caml hridgeport, in the county of Middlesex and 5 State of Massachusetts, have invented certain new and useful Improvements in Gearing; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the saine, reference being,` had to the accompanying` drawings, and to letters or figures of reference marked thereon, which forni a part of this specication.

Figure 1 of the drawings is a front my gearing. Figs. 2 and 3 are sectional views. Fig. 4 is a face view, and Fig. 5 is a perspective section.

`This invention has relation to dev converting reciprocating motion into motion, and it consists in providing, in connection with the main shaft, a worm-wheel,and in connection with the reciprocating cross. head, interniittently-rotating screws, having automatic stop devices, all as hereinafter set forth.

In the accompanying drawings, the designates the main shaft, and b a pis reciprocating in the direction of its To the rod b is secured a crosshead, c

0n the main shaft is keyed a wor1n-wheel,

D, andto the cross-headare connec screws Aand B., which extend parallel other and to the rod b on each side worm-wheel D, which they engage screws A and B. are designed to reciprocate with the cross-head, and are provided with suitable guides, as at E. The screw A is with ahead, g, having a rounded beari face, h, on its outer side, and is provid the annularly-grooved pivot-extension is seated in a recess, L, of circular form, made Ain the top or face of the cross-head.

cess L is provided with an internal ratchet,

in, and below the saine with a circular or bearing, in, for a circular spring, s, to which is fastened, or on which is formed, a lug ject-ion, p, which extends upward or o the teeth of the circular-ratchet m.

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view of ices for rotary letter a, ton-rod length'.

ted the to each of the The formed ng-sur ed with 1t The regroove or propposite To the head f/ of the screw A is pivoted a 5o dog, V, having a notch, r, in the outer edge of its body, in which is received the lug or projection p of the friction-spring s. It is apparent that when the screw A is turned in one direction the friction ring` or spring s wiil cause the dog to engage the ratchet, and that when this`A screw is turned in the opposite direction the friction-spring will cause a slight vibration ofthe dog` on its pivot, immediatelyT releasing said dog from the ratchet and hold- 6o ingit away from the same during the rotation of the screw in this direction. This screw is held to the crosshead by means of an internally-flanged screw-plug, t, which is screwed into the threaded aperture w in the bottom 0f 65 the recess L, and is held from turning` by a setscrew, e. An oil-cup, C, is connected to the projecting ri in of the aperture w. The base ofthe recess L around the aperture w is rounded in concave form to correspond with the rounded 7o convex bearing-surface lz of the head of the screw,l for which it forms a seat, as indicated at Z. The screw A is designed to turn freely on its small bearing in the hollow plug t when the cross-head moves in one direction, and to 75 be rigidly xed in position, bearing againstV the broad concave seat Z when it is at work, the cross-head moving in the opposite direction.

' The screw B is formed with a head, g', hav- 8o ing a rounded hearing-surface, L, on its upper or inner side, and is provided with a pivotextension, It. The head g is seated in a recess, L', whiclris formed in the back of the cross-head o at the opposite end thereof from 8 5 the recess L. The screw B is passed through the aperture e, formed in the center of the recess, and the rounded hearing-surface k is designed to engage a concave seat, Z', in said recess, as shown in the drawings. Across the 9o mouth of the recess L extends a bar or bear ing, d, which is threaded centrally to receive the screw-bearing` G, against which the pivotexteusion k of the screw B is designed tobear when the screw is in rot-ation.

To the head of the screwB is pivoted a dog, V', having a notch, r', in the outer edge of its body, in which is received a projection, p', of

Y into engagement with the ratchet.

a friction-s )rinOp -s which is seated in an anlnular recess or bearing, a', in the circular wall of the recess L, which is also provided with an internal ratchet, m', below said groove. When`the screw B is turned in one direction, the friction ring or spring s will cause the dog to engage the ratchet m, and said spring will effect a disengagement of the dog when the screw is turned in the opposite direction.

It is apparent that when the cross-head c is moved by the reciprocating rod or connection b toward the worm-wheel it will push against the ends of the screws A and B, which are connected thereto, and that when the cross-head is moving in the opposite direction it will pull the screws A and B with it in its movement. The pushing action of the cross-head with reflerence to the screw A will at once bring its broad convex bearing h against the seat 1,-and by the engagement of its thread with the worm-wheel a tendency to rotate will be effected, which, through the operation of the friction spring or ring s, will throw the dog V In this manner the screw A will become xed, so that it cannot rotate, and it will act as araclr, turning the worm-wheel and its shaft', as indicated by the arrow in the drawings. At the same time the cross-head will engage the screw B by the smallbearing-screw G, and saidscrew B will be rotated freely by the action Cf the worm wheel, its dog V being disengaged from the ratchet m by the operation of the friction-ring s'. On the return of the cross-head in moving away from the worm-wheel the latter will tend to reverse the rotary movement of the screw B, putting its dog into engagement with the ratchet m, so that its position becomes fixed, and it operates as a rack, turning the worm-wheel,

as before in the direction of the arrow. At the same time the broad bearing h of the head of the screw B is brought intov engagement with the concave seat in the recess L of the cross-head, and the screw A, being now impelled by the worm-wheel to turn in the opposite direction, effects through the operation of its friction-ring s the release of its dog V, which is held out of engagement, so that said screw A rotates freely on the small bearing t.

By the repeated reciprocating movements of 5o the cross-head the screws engaging the wormwheel are alternately held and released, so that each in succession operates as a rack, one for the forward movement Aand the other for the reverse movement, and the worm-wheel and its connected shaft are continuously turned in the same direction.

Having described this invention,what I claim and desire to secure by Letters Patent isl. A device for converting niotiomconsisting of a worm-wheel on the main shaft, in connection with intermittently-rotating screws, in connection with a reciprocating cross-head, and having automatic stop devices, substantially as specified. h

2. In a device for converting motion, a'wormwheel between engaging-screws pivoted to a cross-head and carrying dogs, in combination with ratchets of the erosshead and friction devices, operating alternately to release and set the dogs, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

l GEORGE MURRAY, JR. Vitnesses: l

' L. M. HANNUM, J. I-I. HAnLow. 

